| (19) |
 |
|
(11) |
EP 0 513 963 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
28.07.1993 Bulletin 1993/30 |
| (43) |
Date of publication A2: |
|
19.11.1992 Bulletin 1992/47 |
| (22) |
Date of filing: 03.02.1992 |
|
|
| (84) |
Designated Contracting States: |
|
BE DE FR GB IT |
| (30) |
Priority: |
14.05.1991 US 699533
|
| (71) |
Applicant: TEXACO CHEMICAL COMPANY |
|
Houston,
Texas 77056 (US) |
|
| (72) |
Inventors: |
|
- Sanderson, John Ronald
Leander, TX 78641 (US)
- Marquis, Edward Thomas
Austin, TX 78758 (US)
|
| (74) |
Representative: Brock, Peter William et al |
|
Urquhart-Dykes & Lord
1 Richfield Place
Richfield Avenue
Reading RG1 8EQ
Berkshire
Reading RG1 8EQ
Berkshire (GB) |
|
| |
|
| (54) |
Preparation of synthetic lubricant base stocks from poly(isobutylene) and linear olefins |
(57) High yields of synthetic lubricant base stocks with high viscosities and high viscosity
indices can be obtained by oligomerizing linear olefins having 10 to 24 carbon atoms
in the presence of up to 10 weight % of poly(isobutylene). The oligomerization catalysts
are acidic calcium montmorillonite clays having a moisture content of up to 20 weight
%, a residual acidity of 3 to 30 mg KOH/g, and a surface area of 300 m²/g or greater.